Fire alarm



FIG. 1 is a front view of our new design;

FIG. 2 is a left view thereof;

FIG. 3 is a back view thereof,

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a perspective view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM What is claimed is the ornamental design for a fire alarm, as shown and described. 